code: def get_worker(cls):
      return cls
  
file_path: metaflow/metaflow/metadata/heartbeat.py
imports: import time
  import requests
  import json
  from threading import Thread
  from metaflow.sidecar import MessageTypes, Message
  from metaflow.metaflow_config import SERVICE_HEADERS
  from metaflow.exception import MetaflowException
label_desc: Use image node_id 3 for calling the MetadataHeartBeat obj's underlying member method code with example usage: obj.get_worker(cls) and returns: cls